Highlights

• 🚀 Improved Dev Server: faster, more reliable reloads without race conditions.
• 📦 Ecosystem split: IHP now modular (ihp-ide, ihp-ssc, ihp-migrate, ihp-sitemap).
• 🔧 New helpers: createRecordDiscardResult, copyRecord, queryUnionList, orderByAscJoinedTable.
• 🛠️ Production-ready: warp + systemd integration, healthcheck endpoint, better job runner handling.
• 🐘 Compiler upgrade: GHC 9.8 (with support for 9.10 and 9.12).

Major Changes

• Added createRecordDiscardResult (complements updateRecordDiscardResult) for cases where the result is not needed (e.g. scheduling jobs).
• Added copyRecord for easier duplication of database records.
• Improved Dev Server reliability and performance. Race conditions on rapid file updates are fixed by using proper bracketed resource management.
• Split IHP into multiple packages (ihp-ide, ihp-ssc, ihp-migrate, ihp-sitemap) for cleaner dependency boundaries.
• Production improvements: integrated warp-systemd, added healthcheck endpoint, and improved socket activation.
• Upgraded to GHC 9.8, with support for 9.10.x and 9.12.x.

Minor Changes

Nix / Deployment

• Added options: rtsFlags, optimizationLevel, appName.
• Support for aarch64 NixOS deployments.
• Faster nix build via caching of Generated.Types.
• Simplified migration service (IHP_MIGRATION_DIR).
• Dropped dependency on ihp source to reduce closure size.
• Updated nixpkgs to 25.05 and devenv to 1.8.2.
• Use flake overlays instead of manual mkGhcCompiler.
• Don’t set system.stateVersion automatically (configured in project’s flake.nix).

Job Runner

• Jobs with timeouts are now restarted if workers crash.
• Improved async handling of jobrunner.
• Use ResourceT for job worker scheduling to avoid leaks.
• Exceptions are now printed to logs for easier debugging.
• Don’t log job worker SQL queries.

DataSync

• Fixes: arrays double-escaped, connections closed prematurely, crash with spaces in table names, non-snake_case column names.
• Features: added useCount, custom newRecordBehaviour, support for event triggers, React 18 useSyncExternalStore.
• Avoid creating large_pg_notifications table when not needed.

HSX / View Layer

• Added uncheckedHsx and customHsx.
• Lucid2 port and core library split.
• Added missing HTML attributes.
• Fixed generator issues (brackets, variable references, migrations).
• Use Blaze helpers in HSX.

SQL / Query Layer

• Added filterWhereInCaseInsensitive, queryUnionList, orderByAscJoinedTable / orderByDescJoinedTable.
• Refactored pagination queries.
• Logging improvements: show final SQL, rounded runtimes, simplified log format with icons.

Storage

• Support custom storage directory via IHP_STORAGE_DIR.
• Support custom filenames in storeFileFromPath.
• S3 storagePrefix now returns base URL.
• Fix createTemporaryDownloadUrlFromPath.

Miscellaneous

• Support custom base URL in assetPath.
• Add withPGListener.
• Always evaluate Blaze HTML.
• Added mainInParentDirectory.
• Enabled warp file cache in production.
• Set default gracefulShutdownTimeout.
• Improved schema compiler performance.

IHP OpenAI

• Removed deprecated prompt field.
• Added support for tools and tool calls, response_format, Anthropic cache_control, Google Gemini.
• Added extraHeaders, finish_reason, usage in streaming responses.
• Changed maxTokens, temperature, presencePenalty, frequencyPenalty to Maybe.
• Improved error messages and quota exceeded feedback.
• Added reasoningEffort and parallelToolCalls.
• system_fingerprint is now optional.

Documentation

• Improved deployment docs (workers, systemd integration, AWS Terraform).
• Updated guides for pagination, htmx, realtime SPAs.
• Clarified environment differences between dev/prod.
• Added docs for validateFieldIO and scheduled job execution with runAt.
• Removed outdated NixOS installation instructions.
• Cleaned up Emacs docs.
• Added troubleshooting notes for EC2 deployments.

New Contributors

• @andreytroeglazov made their first contribution in #1986
• @leifmetcalf made their first contribution in #2002
• @kukimik made their first contribution in #2001
• @kursataktas made their first contribution in #2014
• @mmc102 made their first contribution in #2019
• @Nathan-8963 made their first contribution in #2025
• @iteratee made their first contribution in #2055
• @stephenbenedict made their first contribution in #2062
• @ANU-2524 made their first contribution in #2078

Full Changelog: v1.3.0...v1.4.0